1 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay (at) cryptsoft.com). 6 * The implementation was written so as to conform with Netscapes SSL. 7 * 8 * This library is free for commercial and non-commercial use as long as 9 * the following conditions are aheared to. The following conditions 10 * apply to all code found in this distribution, be it the RC4, RSA, 11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 12 * included with this distribution is covered by the same copyright terms 13 * except that the holder is Tim Hudson (tjh (at) cryptsoft.com). 14 * 15 * Copyright remains Eric Young's, and as such any Copyright notices in 16 * the code are not to be removed. 17 * If this package is used in a product, Eric Young should be given attribution 18 * as the author of the parts of the library used. 19 * This can be in the form of a textual message at program startup or 20 * in documentation (online or textual) provided with the package. 21 * 22 * Redistribution and use in source and binary forms, with or without 23 * modification, are permitted provided that the following conditions 24 * are met: 25 * 1. Redistributions of source code must retain the copyright 26 * notice, this list of conditions and the following disclaimer. 27 * 2. Redistributions in binary form must reproduce the above copyright 28 * notice, this list of conditions and the following disclaimer in the 29 * documentation and/or other materials provided with the distribution. 30 * 3. All advertising materials mentioning features or use of this software 31 * must display the following acknowledgement: 32 * "This product includes cryptographic software written by 33 * Eric Young (eay (at) cryptsoft.com)" 34 * The word 'cryptographic' can be left out if the rouines from the library 35 * being used are not cryptographic related :-). 36 * 4. If you include any Windows specific code (or a derivative thereof) from 37 * the apps directory (application code) you must include an acknowledgement: 38 * "This product includes software written by Tim Hudson (tjh (at) cryptsoft.com)" 39 * 40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50 * SUCH DAMAGE. 51 * 52 * The licence and distribution terms for any publically available version or 53 * derivative of this code cannot be changed. i.e. this code cannot simply be 54 * copied and put under another distribution licence 55 * [including the GNU Public Licence.] */ 56 57 #include <openssl/evp.h> 58 59 #include <assert.h> 60 61 #include <openssl/asn1.h> 62 #include <openssl/err.h> 63 #include <openssl/obj.h> 64 #include <openssl/x509.h> 65 66 #include "internal.h" 67 68 69 int EVP_DigestSignAlgorithm(EVP_MD_CTX *ctx, X509_ALGOR *algor) { 70 const EVP_MD *digest; 71 EVP_PKEY *pkey; 72 int sign_nid, paramtype; 73 74 digest = EVP_MD_CTX_md(ctx); 75 pkey = EVP_PKEY_CTX_get0_pkey(ctx->pctx); 76 if (!digest || !pkey) { 77 OPENSSL_PUT_ERROR(EVP, EVP_R_CONTEXT_NOT_INITIALISED); 78 return 0; 79 } 80 81 if (pkey->ameth->digest_sign_algorithm) { 82 switch (pkey->ameth->digest_sign_algorithm(ctx, algor)) { 83 case EVP_DIGEST_SIGN_ALGORITHM_ERROR: 84 return 0; 85 case EVP_DIGEST_SIGN_ALGORITHM_SUCCESS: 86 return 1; 87 case EVP_DIGEST_SIGN_ALGORITHM_DEFAULT: 88 /* Use default behavior. */ 89 break; 90 default: 91 assert(0); 92 } 93 } 94 95 /* Default behavior: look up the OID for the algorithm/hash pair and encode 96 * that. */ 97 if (!OBJ_find_sigid_by_algs(&sign_nid, EVP_MD_type(digest), 98 pkey->ameth->pkey_id)) { 99 OPENSSL_PUT_ERROR(EVP, EVP_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED); 100 return 0; 101 } 102 103 if (pkey->ameth->pkey_flags & ASN1_PKEY_SIGPARAM_NULL) { 104 paramtype = V_ASN1_NULL; 105 } else { 106 paramtype = V_ASN1_UNDEF; 107 } 108 109 X509_ALGOR_set0(algor, OBJ_nid2obj(sign_nid), paramtype, NULL); 110 return 1; 111 } 112 113 int EVP_DigestVerifyInitFromAlgorithm(EVP_MD_CTX *ctx, 114 X509_ALGOR *algor, 115 EVP_PKEY *pkey) { 116 int digest_nid, pkey_nid; 117 const EVP_PKEY_ASN1_METHOD *ameth; 118 const EVP_MD *digest; 119 120 /* Convert signature OID into digest and public key OIDs */ 121 if (!OBJ_find_sigid_algs(OBJ_obj2nid(algor->algorithm), &digest_nid, 122 &pkey_nid)) { 123 OPENSSL_PUT_ERROR(EVP, EVP_R_UNKNOWN_SIGNATURE_ALGORITHM); 124 return 0; 125 } 126 127 /* Check public key OID matches public key type */ 128 ameth = EVP_PKEY_asn1_find(NULL, pkey_nid); 129 if (ameth == NULL || ameth->pkey_id != pkey->ameth->pkey_id) { 130 OPENSSL_PUT_ERROR(EVP, EVP_R_WRONG_PUBLIC_KEY_TYPE); 131 return 0; 132 } 133 134 /* NID_undef signals that there are custom parameters to set. */ 135 if (digest_nid == NID_undef) { 136 if (!pkey->ameth || !pkey->ameth->digest_verify_init_from_algorithm) { 137 OPENSSL_PUT_ERROR(EVP, EVP_R_UNKNOWN_SIGNATURE_ALGORITHM); 138 return 0; 139 } 140 141 return pkey->ameth->digest_verify_init_from_algorithm(ctx, algor, pkey); 142 } 143 144 /* Otherwise, initialize with the digest from the OID. */ 145 digest = EVP_get_digestbynid(digest_nid); 146 if (digest == NULL) { 147 OPENSSL_PUT_ERROR(EVP, EVP_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM); 148 return 0; 149 } 150 151 return EVP_DigestVerifyInit(ctx, NULL, digest, NULL, pkey); 152 } 153 154
